Efficient SSA-mediated precise genome editing using CRISPR/Cas9.

Area of Science:

• Molecular Biology
• Genetics
• Biotechnology

Background:

• CRISPR/Cas9 technology enables genome editing but precise, scarless editing remains a challenge.
• Existing two-step methods like CRISPR/Cas9 with Cre/LoxP or piggyBac transposons have limitations, including residual sequences or uncontrolled integration.
• The need for efficient and scarless precise genome editing techniques is critical for research and therapeutic applications.

Discussion:

• This study presents a novel two-step precise genome editing method combining CRISPR/Cas9 with the SSA-mediated repair mechanism.
• The method utilizes an integrating cassette with selection markers flanked by direct repeat sequences (SSA arms) for seamless editing.
• Successful application in CCR5 and APP loci demonstrated high precise genome editing efficiencies, up to 45.83% and 68% respectively.

Key Insights:

• A novel scarless genome editing technique is developed by integrating CRISPR/Cas9 with SSA repair.
• The method achieves high efficiency in precise gene editing and correction.
• Demonstrated efficacy in CCR5 and APP loci highlights its potential for various gene editing applications.

Outlook:

• This technique offers a promising new tool for precise genome editing and gene correction.
• Further applications in complex genetic modifications and therapeutic gene editing are anticipated.
• The development of scarless editing methods is crucial for advancing gene therapy and synthetic biology.